"They took him to an urgent care center in Marietta, Ga., where a doctor gave him antibiotics and prescribed him Tamiflu, his parents told WSB-TV."

"They brought him back to the walk-in clinic. Doctors ran some more tests and confirmed he tested negative for the flu, but they told his parents they were concerned about a rash they noticed across his body, CBS News reports."

"While the American Academy of Dermatology says allergic reactions or infections could be a cause of hives, the Centers for Disease Control and Prevention (CDC) does not list hives as a common flu symptom. They do, however, say a fever with a rash is an "emergency warning sign" of a flu-related illness. "